A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Which tank will fill first?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Which is heavier: a ton of bricks or a ton of feathers?

What Deficiency does the below rebus represent?

VIT_MIN

What does this rebus means ?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?